The first generation of the Pentium, codenamed P5, featured a 32-bit architecture with a 64-bit data bus and a 32-bit address bus. It introduced several new technologies, including dynamic execution, which allowed the processor to execute instructions out of order to optimize performance. The Pentium also included a built-in floating-point unit (FPU) and a 16 KB L1 cache.
The Pentium Pro, introduced in 1995, was a significant upgrade to the original Pentium. It featured a 64-bit architecture with a 64-bit data bus and a 36-bit address bus. The Pentium Pro also introduced a new cache architecture, with a 16 KB L1 cache and a 256 KB L2 cache. It was the first Intel processor to use a superscalar architecture with out-of-order execution.
The Pentium II, introduced in 1997, was a further upgrade to the Pentium Pro. It featured a 32-bit architecture with a 64-bit data bus and a 32-bit address bus. The Pentium II also introduced a new cache architecture, with a 32 KB L1 cache and a 512 KB L2 cache. It was the first Intel processor to use a 3DNow! instruction set, which allowed it to perform multimedia operations more efficiently.
The Pentium III, introduced in 1999, was a further upgrade to the Pentium II. It featured a 32-bit architecture with a 64-bit data bus and a 32-bit address bus. The Pentium III also introduced a new cache architecture, with a 32 KB L1 cache and a 512 KB L2 cache. It was the first Intel processor to use the SSE (Streaming SIMD Extensions) instruction set, which allowed it to perform multimedia operations more efficiently.
The Pentium 4, introduced in 2000, was a significant upgrade to the Pentium III. It featured a 32-bit architecture with a 64-bit data bus and a 32-bit address bus. The Pentium 4 also introduced a new cache architecture, with a 128 KB L1 cache and a 512 KB L2 cache. It was the first Intel processor to use the NetBurst microarchitecture, which allowed it to perform multimedia operations more efficiently.